Touch Fin RPN

Touch Fin RPN

By Elvis Pfutzenreuter

  • Category: Finance
  • Release Date: 2014-12-07
  • Current Version: 4.11
  • Adult Rating: 4+
  • File Size: 48.92 MB
  • Developer: Elvis Pfutzenreuter
  • Compatibility: Requires iOS 10.0 or later.
Score: 3.5
From 93 Ratings


Touch Fin RPN is an RPN financial and scientific calculator that implements most features of the industry-standard HP-12C, including programming functions. It also implements a scientific RPN flavor that implements most functions of the beloved 11C. And even more flavors (10C-like, 16C-like) can be purchased within the app.



  • Looks like garbage on iPhone X

    By Cybersnyder
    Everything is fine on older phones, but the layout is garbage on the larger screen. Avoid.
  • Basic math?

    By Astrostar1
    Basic math, divide and multiply, do not work. Is that intended with the free version?
  • Great app. Worth paying for

    By Labyy
    I originally downloaded the free app. I upgraded to the Palladium version for $5 and it didn’t work. It started working and it’s fantastic I think I did something wrong. It’s worth paying for the ad free version and for it to display vertically as well.
  • Can’t have multiple calls open

    By Dhjdhj
    I had the 11, 15 and 16. Opened one today and was told it was being “sunset” and I should get this one instead. Once I opened my old ones, the new app worked fine with no ads. It it has one huge disadvantage. I use to keep the 16 and the 11 open at the same time. Now I have to switch modes. That is NOT an improvement.
  • Great - with one exception

    By chrsfrncs
    I love this app- looks and functions just like the real thing. However, I have one problem with the display. Maybe it’s a setting that I can change, but I can’t figure it out. This is not the classic “the comma and decimal are switched” complaint, because I know that is fixable. Rather, my problem is with comma placement. After the first comma separator (between the hundreds and thousands), which is in the right place. It starts putting commas every 2 spaces instead of 3. So 7 million displays as “70,00,000.00”. 700 million displays as “70,00,00,000.00”. So far it doesn’t appear to affect calculations, but it’s really annoying
  • Want an 11c like I had before!!

    By LWB2002
    Shouldn’t have deleted the old one before finding out this was a financial calculator - not an 11c. Doesn’t seem to have a way to turn on key clicks either. Should have kept ignoring the pop up window telling me to upgrade! No ads on that one either.
  • iOS asks for my Apple ID login when I launch app

    By Mister Bix
    iOS asks for my Apple ID login each time I launch app. Don’t know if this is triggered by app or a quirk in iOS. Solid app otherwise. I highly recommend it if you’re nostalgic for the halcyon days of HP calculators.
  • Odd behavior

    By Huskerfan69
    Why is your app the only one that consistently has a window popping up asking me to input my Apple ID password? No other app I have does that. Coincidence or not. You be the judge.
  • Good but ...

    By softwarehobbit
    As the owner of a real HP 11C, it’s nice. But a couple of nits: The program does not accept input from a Bluetooth Keyboard. I’m not looking for magic here, but it should accept numerics, Period, Enter, Delete, up/down (roll the stack), +-x/. Maybe also C (CHS) and E (EEX), and CMD-Delete (clear stack) Why if one is has paid for the Premium Scientific calc one does not have access to the basic version?
  • Very disappointed, would like a refund

    By Steelheadhunter
    Had the 11c and liked it. Was offered this instead of a refund. Don’t want a 12c, that’s why I purchased the 11c. Recommend spending with someone who supports their product.